package leetcode_701_800;

public class LeeCode_709 {
    public static void main(String[] args) {

    }
    private static String toLowerCase(String s) {
        StringBuilder sb = new StringBuilder();
        int cha = 'a' - 'A';
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if (c >= 'A' && c <= 'Z'){
                c += cha;
            }
            sb.append(c);
        }
        return sb.toString();
    }
}
